分享码功能的实现，并修复了几个 bug

client/src/pages/eq/utils.ts

@@ -1,4 +1,5 @@
 import type { PeqFilter, PeqState } from "@/lib/luxsinApi";
+import { normalizePeqFiltersForSubmit } from "@/lib/luxsinApi";
 import { getFilterShortName, getFilterType } from "@/lib/peqAudio";
 import {
   BAND_FREQ_MIN,
@@ -197,6 +198,19 @@ export function getUniquePresetName(
   return `${base}_${index}`;
 }
 
+/** Normalize shared/imported EQ filters into device PeqFilter[]. */
+export function importedFiltersToPeqFilters(filters: unknown): PeqFilter[] {
+  return normalizePeqFiltersForSubmit(filters).map((f) => {
+    const item = f as Record<string, unknown>;
+    return {
+      fc: Number(item.fc ?? item.freq ?? item.frequency ?? 1000),
+      gain: Number(item.gain ?? 0),
+      q: Number(item.q ?? 1),
+      type: getFilterType(item.type as string | number),
+    };
+  });
+}
+
 /* ── Convert UI band → device PeqFilter ── */
 export function bandToPeqFilter(b: {
   freq: number;